<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>面向对象</title>
</head>

<body>
    <script type="text/javascript">
        function Foo() {
            getName = function() {
                console.log(1);
            };
            return this;
        }
        Foo.getName = function() {
            console.log(2);
        };
        Foo.prototype.getName = function() {
            console.log(3);
        };
        var getName = function() {
            console.log(4);
        };

        function getName() {
            console.log(5);
        }

        Foo.getName(); // 2
        getName(); // 4
        Foo().getName(); // 1
        new Foo.getName(); //  2
    </script>

</body>

</html>